'Surreal' market environment could turn focus back on Brexit
Luke MacGregor | Bloomberg | Getty Images. David Ramsden joined the Bank of England (BOE) Monday as deputy governor for markets, with analysts expecting the economist to stick to a dovish line. · CNBC

Brexit could return to the forefront on Thursday, as the Bank of England meets and big U.S. banks start to roll out earnings.

The Bank of England meeting puts the spotlight back on how the U.K. will deal with the financial implications of its exit from the European Union , now that Theresa May was named Prime Minister Wednesday. Bank of England Governor Mark Carney has suggested more than once that the central bank could provide stimulus this summer to ward off a recession, and many in the markets take him at his word.

A Reuters survey of economists showed that 39 of 60 respondents expected the central bank to announce a quarter point cut to the 0.5 percent bank rate when it issues its statement at 7 a.m. EDT.

"My guess is you'll see a rate cut but you will probably not see the parameters of a quantitative easing," said Rick Rieder, chief investment officer of global fixed income at BlackRock. Economists expect the BOE to wait until August to announce a quantitative easing asset purchase program, but Rieder said Carney may discuss the other tools he has available.

"I think the markets are anticipating a description that they will do more if necessary, and if there is not rate cut you could see a back-up in yields in the U.S.," Rieder said.

U.S. Treasurys gained Wednesday, halting this week's decline, and yields fell as a result. The 10-year note (U.S.: US10Y) was yielding 1.47 percent late in the day, while the 30-year yield (U.S.: US30Y) was 2.17 percent. The demand at Wednesday's $12 billion 30-year bond auction was the strongest since September, a stark contrast to the weak 10-year note auction the day earlier.

Stocks were mixed, with the Dow (Dow Jones Global Indexes: .DJI) up 24 points at a new record close of 18,372, and the S&P 500 (INDEX: .SPX) also reached a new high, rising less than a point to 2,152.43. The Nasdaq (NASDAQ: .IXIC) was lower, off 17 at 5,005.

Bonds will continue to be a focus Wednesday as the stock market also absorbs the first of the major financial companies' earnings; JPMorgan Chase and BlackRock both report before the opening.

JPMorgan is expected to earn $1.42 per share on revenue of $24.2 billion, according to FactSet. Wells Fargo and Citigroup report Friday, and Bank of America reports Monday.

"I'm hopeful it will show the U.S. banks have been pretty much impervious to the vagaries of Europe," said Jack Ablin, BMO Private Bank CIO. "I think that's an important thing, but it will be interesting to see what JPMorgan has to say about their London capital markets operation."

U.S. banks are widely expected to move some operations out of the U.K., as a result of the split between Britain and the EU.